Pak Exam MCQs

Which can read data and convert them to a form that a computer can use?

A. Logic
B. Storage
C. Output Device
D. Control
E. Input Device

Answer & Solution

Option: E
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Which of the following statements is true?

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A. The Smart approach to using computers is to write programs
B. Hands-on exposure to the computer is not helpful to those who write programs
C. Personal computers have been an important contributing factor in the movement toward using computers without programming
D. Knowledge of the system development life cycle is not important to operators who use computers without programming

Answer & Solution

Option: C
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Which of the following does not describe one or more characteristics of a computer?

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A. Electronic
B. External storage
C. Stored program
D. Program modification at execution
E. All of the above are characteristics

Answer & Solution

Option: D
Explanation :Which of the following does not describe one or more characteristics of a computer the correct option is all of these. Computer is an electronic machine used to solve different problems according to a set of instructions given to it. A computer can accept data, process data into useful information and store it for later use. A computer derives its basic strength from speed, reliability, accuracy, storage, versatility, consistency, communication, recalling, control sequence and cost reductions.

I. Speed:-

Computer processes data at a very high speed. It is much faster than human beings. A computer can perform billions of calculations in a second. Computer speed is measured in Mega Hertz (MHz) or Giga Hertz (GHz).

II. Reliability:-

Computer is very reliable because in modern computer electronic components rarely break or fail.

III. Accuracy:-

Accuracy means that the computer provides results without any errors. Computer can process large amounts of data and produce results accurately. Computer result can be wrong only if the data given is not correct.

IV. Storage/Memory:-

Computer can store a large amount of data permanently or temporarily. People can use permanently stored data at any time. For example a computer can store thousands of books easily.

V. Versatility:-

Computer is a versatile machine so it can perform different types of tasks. That is why it is being used in every field of life. Computer is used in hospital, bank, office, and at home etc.

VI. Consistency:-

Computer works in a consistent way. It does not lose concentration due to heavy work. In other words, computer does not become tired or bored.

VII. Communication:-

Computer have capability to communicate with other computers. Therefore, these computers can share data, instructions, and information.

VIII Recalling:-

A computer can recall the stored data and information as and when required. In addition, computer can recall the required data in a few seconds.

IX Cost Reduction:-

Computer can perform a difficult task in less time and less cost.
In short, Which of the following does not describe one or more characteristics of a computer the correct option is all of these( Electronic, External storage, Stored program, Program modification at execution).

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Group of instructions that directs a computer is called

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A. Storage
B. Logic
C. Memory
D. Program
E. All of these

Answer & Solution

Option: D
Explanation :A computer program is a list of instructions that tell a computer what to do. Everything a computer does is done by using a computer program. A computer program is written in a programming language.

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Which acronym recognizes the fact that “computer errors” can usually be traced to incorrect input data or unreliable programs

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A. FIFO
B. GIGO
C. LIFO
D. DASD
E. ROM

Answer & Solution

Option: B
Explanation :GIGO Stands for “Garbage In, Garbage Out.” GIGO is a computer science acronym that implies bad input will result in bad output.
GIGO is a universal computer science concept, but it only applies to programs that process invalid data. Good programming practice dictates that functions should check for valid input before processing it. A well-written program will avoid producing garbage by not accepting it in the first place. Requiring valid input also helps programs avoid errors that can cause crashes and other erratic behavior.

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Pick up the correct statement

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A. Minicomputers cannot use high-speed buffer storage components and thus always slower than mainframe models.
B. Mainframes may have multiprocessor components that permit several tasks to be processed at the same instant in time
C. Super-computers are usually designed to process accounting applications
D. Most mainframes are 48-bit machines
E. Thousands of super computers are currently being built

Answer & Solution

Option: B
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Control Unit of a digital computer is often called the

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A. Clock
B. Nerve center
C. ICs
D. All of the above

Answer & Solution

Option: B
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Choose the incorrect statement about micro computers, mini-computers, etc.

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A. Most micros use rigid disk storage devices rather than floppy disk drives.
B. A minicomputer can have more processing capability than a mainframe model
C. A microcomputer chip performs the arithmetic-logic and control functions of a microcomputer
D. ROM chips may be used in micros to permanently store program instruction

Answer & Solution

Option: A
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What happen when data is entered into a memory location?

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A. It will add to the content of the location
B. It will change the address of the memory location
C. It will erase the previous content
D. It will not be fruitful if there is already some data at that location

Answer & Solution

Option: C
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