## KVS DEC-2013

 Question 1
When the object making the sound is moving towards you, the frequency goes up due to he waves getting pushed more tightly together. The opposite happens when the object moves away from you and the pich goes down. This phenomenon is called
 A Band Width B Doppler effect C Sound refraction D Vibrations
Data-Communication       Doppler-Effect
Question 1 Explanation:
→ The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.
→ The Doppler effect is observed whenever the source of waves is moving with respect to an observer.
→ The Doppler effect can be described as the effect produced by a moving source of waves in which there is an apparent upward shift in frequency for observers towards whom the source is approaching and an apparent downward shift in frequency for observers from whom the source is receding.
 Question 2
Even when the screen is completely dark while the film is in motion, commercial motion pictures use
 A 32 frames per second or 101 screen illuminations per second B 72 frames per second or 234 screen illuminations per second C 8 frames per second or 32 screen illuminations per second D 24 frames per second or 72 screen illuminations per second
Computer-Graphics       Motion-Pictures
Question 2 Explanation:
→ Motion picture, also called film or movie, series of still photographs on film, projected in rapid succession onto a screen by means of light.
→ When a motion picture film is projected on a screen at the rate of at least 16 illuminations per second but the commercial motion pictures uses 24 frames per second or 72 screen illuminations per second.
→ Film Technology standard is 24 frames per second, a three bladed shutter and some dreamy motion blur, all projected as shadow and light on the side of a wall.
 Question 3
Internet Control message protocol(ICMP)
 A Allows gateways to send error control messages to other gateways or hosts B Provides communication between the internet protocol software on one machine and the internet protocol software on another C Only reports error conditions to the original source, the source must relate errors to individual application programs and take action to correct the problem. D All of these
Computer-Networks       OSI-TCP-layers
Question 3 Explanation:
→ The Internet Control Message Protocol (ICMP) is used by network devices, including routers, to send error messages and operational information indicating, for example, that a requested service is not available or that a host or router could not be reached.
→ ICMP creates and sends messages to the source IP address indicating that a gateway to the Internet that a router, service or host cannot be reached for packet delivery.
 Question 4
____refers to these attributes of a system visible to a programmer or, put another way, those attributes that have a direct impact on the logical execution of a program
 A Computer organization B Computer architecture C Microprocessor D Bus
Computer-Organization       Computer-Architecture
Question 4 Explanation:
→ Computer architecture is a set of rules and methods that describe the functionality, organization, and implementation of computer systems.
→ Computer architecture involves instruction set architecture design, microarchitecture design, logic design, and implementation.
→ Organization of computer system is the way of practical implementation which results in realization of architectural specifications of a computer system.
→ A microprocessor is a computer processor that incorporates the functions of a central processing unit on a single integrated circuit (IC),or at most a few integrated circuits.
→ A bus is a communication system that transfers data between components inside a computer, or between computers.
 Question 5
How many characters does an escape sequence (\On, \Hn,\n,\f) in C++ consume?
 A 1 B 3 C 2 D None of these
OOPS       Properties
Question 5 Explanation:
→ An escape sequence is a sequence of characters that does not represent itself when used inside a character or string literal, but is translated into another character or a sequence of characters that may be difficult or impossible to represent directly.
→ All escape sequences consist of two or more characters, the first of which is the backslash, \ (called the "Escape character"); the remaining characters determine the interpretation of the escape sequence. For example, \n is an escape sequence that denotes a newline character.
→ If we treat it a character constant means one character
Note: An escape sequence is regarded as a single character and is therefore valid as a character constant.
 Question 6
The closeness of the recorded version to the original sound is called
 A Fidelity B Digitization C Sampling D Nyquist Theorem
Data-Communication       Fidelity
Question 6 Explanation:
→ Digitization is the process of converting information into a digital format . In this format, information is organized into discrete units of data (called bit s) that can be separately addressed (usually in multiple-bit groups called bytes).
→ sampling is the reduction of a continuous-time signal to a discrete-time signal. A common example is the conversion of a sound wave (a continuous signal) to a sequence of samples (a discrete-time signal).
→ "fidelity" denotes how accurately a copy reproduces its source
 Question 7
Which layers of the OSI model are host to host layers?
 A transport,session,Presentation, Application B Network,Transport,Session,Presentation C Datalink, Network, Transport, Session D Physical,Data Link,Network,Transport
Computer-Networks       OSI-TCP-layers
Question 7 Explanation:
Datalink, Network, Transport, Session are host to host layers.
 Question 8
The following diagram depicts a______cell.
 A Storage B Mobile C Memory D Register
Operating-Systems       Memory-Management
Question 8 Explanation:
● Computer memory is the storage space in the computer, where data is to be processed and instructions required for processing are stored.
● In the computer memory , we will perform read and write operations.
 Question 9
The diagram below represents
 A Moore’s law B Newton raphson method C Boyle’s law D Gregor law
Data-Communication       Moore’s-law
Question 9 Explanation:
Moore's law is the observation that the number of transistors in a dense integrated circuit doubles about every two years.
 Question 10
_____ is the first Intel x86 microprocessor with a dual core, referring to the implementation of two processors on a single chip
 A Core B Core 2 duo C Dual core D Centrino
Computer-Organization       Microprocessor
Question 10 Explanation:
Core:​ This is the first Intel x86 microprocessor with a dual core, referring to the implementation of two processors on a single chip.
Core 2:​ The Core 2 extends the architecture to 64 bits. The Core 2 Quad provides four processors on a single chip. More recent Core offerings have up to 10 processors per chip.
Dual-core​ refers to a CPU that includes two complete execution cores per physical processor. It has combined two processors and their caches and cache controllers onto a single integrated circuit (silicon chip).
 Question 11
_____chips are high speed processor that are known for their small die size and low power requirements. They are widely used in PDAs and other handheld devices, including games and phones as well as a large variety of consumer products. It is probably the most widely used embedded processor architecture and indeed the most widely used processor architecture of any kind in the world.
 A HAND B LEG C ARM D SUN
Computer-Organization       ARM-Processor
Question 11 Explanation:
→ An ARM processor is one of a family of CPU’s based on the RISC (reduced instruction set computer) architecture developed by Advanced RISC Machines(ARM). ARM makes 32-bit and 64-bit RISC multi-core processors.
→ ARM processors are extensively used in consumer electronic devices such as Smartphones,tablets, multimedia players and other mobile devices, such as wearable. Because of their reduced instruction sets, they require fewer transistor, which enables a smaller die size for the integrated circuitry (IC).
 Question 12
Which of the following is not true for overloaded function in C++?
 A Overloaded functions should have different arguments lists B Overloaded functions having the same argument lists should have a different return type. C Functions cannot be overloaded on the basis of one being static and the other non static D None of these
OOPS       Properties
Question 12 Explanation:
Two or more functions having same name but different argument(s) are known as overloaded functions. So option is not true.
 Question 13
A____is a communication pathway connecting two or more devices. Another of its key characteristics is that it is a shared transmission medium. A signal transmitted by any one device is available for reception by all other devices attached to it.
 A Train B Bus C Tram D Aeroplane
Computer-Networks       Topologies
Question 13 Explanation:
A bus is a communication system that transfers data between components inside a computer, or between computers.
 Question 14
The following diagram shows a
 A Bus interconnection scheme B Memory interconnection scheme C I/O D Throughput
\"Computer-Networks\"Computer-Networks        Topologies
Question 14 Explanation:
→ Computer components are interconnected by using a set of parallel lines (Conducted Wires). Each of these lines can be used to transfer a sequence of bits from one component of the computer to the other component. This is a set of parallel lines is called BUS.
→ Generally a computer has more than one bus interconnection. The bus used to connect the main components of a computer is called the ​ System Bus​ .
 Question 15
Which constructor will be called by the following lines of code?
(i) Student S1;
(ii) Student S2=S1;
 A First copy constructor, then default constructor B First default constructor, then copy constructor C Default constructor for both lines of code D Copy constructor for both lines of code
OOPS       Constructors
Question 15 Explanation:
→ Student S1:----whenever we create object to the class , automatically default constructor will be called.
→ Student S2=S1:------The copy constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously.
 Question 16
_____ memory is intended to give memory speed approaching that of the fastest memories available, and at the same time provide a large memory size at the price of less expensive types of semiconductor memories
 A Register B Counter C Flip flop D cache
Computer-Organization       Cache
Question 16 Explanation:
→ Cache memory, also called CPU memory, is high-speed static random access memory (SRAM) that a computer microprocessor can access more quickly than it can access regular random access memory (RAM).
→ Register memory is the smallest and fastest memory in a computer.
→ Register memory size very small compared to Cache memory.
 Question 17
Consider the following EMP table and answer the question below:

Which of the following select statement should be executed if we need to display the average salary of employees who belongs to grade “E4”?
 A Select avg(salary) from EMP whose grade=”E4”; B Select avg(salary) from EMP having grade=”E4”; C Select avg(salary) from EMP group by grade where grade=”E4”; D Select avg(salary) from EMP group by grade having grade=”E4”;
Database-Management-System       SQL
Question 17 Explanation:
→ Condition specified in WHERE clause is used while fetching data (rows) from table, and data which doesn't pass the condition will not be fetched into result set,
→ HAVING clause is used to filter summarized data or grouped data.
→ In the question, we require average salary of employees whose grade is E4. So we require grouped data.
 Question 18
The major functions or requirements for an I/O module fall into which of the following categories?
 A Control and timing B Processor Communication C Data buffering D All of these
Operating-Systems       I/O-Management
Question 18 Explanation:
● The computer systems Input/output (I/O) architecture is to interface to the outside world.
● Each I/O module interfaces to the system bus and controls one or more peripheral devices.
● The major functions of an I/O module are categorized as follows:
■ Control and
■ Processor
■ Device communication
■ Data buffering
■ Error Detection
 Question 19
Consider an arbitrary number system with the independent digits as 0,1 and X. What is the radix of this number system?
 A 1 B 2 C 3 D 4
Digital-Logic-Design       Number-Systems
Question 19 Explanation:
→ The radix of a number system is the number of unique digits, including, zero, that are used to represent larger numbers. In the decimal system that would be 0 to 9.
→ In the question, the unique digits are 0,1 and X(possible x value is 2) then number system is 3;
 Question 20
The following diagram shows a
 A Exclusive NOR gate B NAND gate C AND gate D OR gate
Digital-Logic-Design       Logic-Gates
Question 20 Explanation:
→ The XNOR gate is a digital logic gate whose function is the logical complement of the exclusive OR gate.
→ The two-input version implements logical equality, behaving according to the truth table to the right, and hence the gate is sometimes called an "equivalence gate"
 Question 21
The diagram below shows a
 A Half adder B Half subtractor C Full adder D Full Subtractor
Digital-Logic-Design       Logic-Gates
Question 21 Explanation:
The above diagram gives the following expressions
Difference (D) = (A’B + AB’) = A ⊕ B
Borrow (B) = A’B
 Question 22
Which of the following statements is true?
 A The JAVA compile produces a code for JVM, which is executed by a JAVA interpreter B The JAVA compile produces code directly for JAVA interpreter C The JAVA compiler directly executes codes in JVM D The JAVA compile helps in directly executing a code on different operating
OOPS       Properties
Question 22 Explanation:
● JVM is a engine that provides runtime environment to drive the Java Code or applications. It converts Java bytecode into machines language.
● First, Java code is compiled into bytecode. This bytecode gets interpreted on different machines
 Question 23
A/an _____, also called a dta selector, is a combinational circuit with more than on input line, one output line and more than one selection line.
 A De multiplexer B Multiplexer or MUX C Operational amplifier D Integrated circuit
Digital-Logic-Design       Combinational-Circuits
Question 23 Explanation:
● A multiplexer (or mux) is a device that combines several analog or digital input signals and forwards them into a single output line.
● A multiplexer of 2​ n​ inputs has n select lines, which are used to select which input line to send to the output.
● A multiplexer is also called a data selector. Multiplexers can also be used to implement Boolean functions of multiple variables.
 Question 24
Determine the function performed by the combinational circuit of the given figure.
 A 4 to 1 multiplexer B 8 to 1 multiplexer C 16 to 1 multiplexer D 32 to 1 multiplexer
Digital-Logic-Design       Combinational-Circuits
Question 24 Explanation:
Four input lines I​ 0​ ,I​ 1​ ,I​ 2​ and I​ 3​ and Two Selection lines S​ 0 and S​ 1
One output line F
 Question 25
A___ multivibrator circuit is one in which both LOW and HIGH output states are stable
 A Monostable B Bistable C Multistable D Tristable
Data-Communication       stable-multivibrator
Question 25 Explanation:
● The Bistable Multivibrator is another type of two state device.
● Bistable Multivibrators have TWO stable states (hence the name: “Bi” meaning two) and maintain a given output state indefinitely unless an external trigger is applied forcing it to change state.
There are 25 questions to complete.

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