The process of communicating with a file from a terminal is
Answer: B
Correct answer: Interrogation
Putting a question to a file from a terminal and receiving the matching records back is interrogation - querying the file rather than updating it. “Interactive” describes the general style of working at a terminal; interrogation is the particular act of asking the file a question.
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Which of the following is the coding of data so that it can't be easily understood if intercepted.
Answer: C
Correct answer: Encryption
Encryption transforms data with a key so that anyone intercepting it sees only meaningless output, and only a holder of the matching key can recover the original. A bar code and a mnemonic merely re-express data in another notation, with nothing kept secret.
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What is full form of VDU ?
Answer: B
Correct answer: Visual Display Unit
VDU stands for Visual Display Unit - the screen on which the computer’s output is shown, historically a cathode-ray tube and now a flat panel. It is an output device: it displays results but captures nothing.
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Device drivers are _____________
Answer: B
Correct answer: Small, special-purpose programs
A device driver is a small program that translates the operating system’s general requests into the particular commands one model of device understands, so a new printer or card can be supported by installing its driver rather than by changing the operating system. The innermost part of the operating system is the kernel.
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The strategy of allowing processes that are logically runnable to be temporarily suspended is called
Answer: A
Correct answer: preemptive scheduling
Under preemptive scheduling the operating system may take the processor away from a process that is still perfectly able to run - when its time slice expires or a higher-priority process becomes ready - and give it to another. Non-preemptive scheduling lets a process keep the processor until it blocks or finishes.
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What is full form of GUI in terms of computers ?
Answer: A
Correct answer: Graphical user Interface
GUI is a graphical user interface - windows, icons, menus and a pointer, operated with a mouse or a touch screen. It replaced the command line, where every instruction had to be typed and remembered.
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The parity bit is added for the purpose of?
Answer: B
Correct answer: Error detection
A parity bit is appended so that the number of 1s in the group is always even (or always odd). If a single bit is corrupted in transit or in storage, the count no longer matches and the error is detected - though parity locates nothing and so cannot correct it.
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A language which is close to that used within the computer is
Answer: C
Correct answer: Low-level language
A low-level language works in the terms the machine itself uses - its instructions, its registers, its addresses - so it is close to the hardware and tied to one processor family. Machine code and assembly language are the two levels of it; a high-level language hides the machine behind statements written for people.
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In which addressing mode the contents of a register specified in the instruction are first decremented, and then these contents are used as the effective address of the operands?
Answer: D
Correct answer: auto decrement
In auto-decrement addressing the register named in the instruction is first stepped back and only then used as the effective address. The order matters: decrement-then-use is what makes it the natural complement of auto-increment for pushing onto a stack that grows downwards.
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Who invented Java language ?
Answer: C
Correct answer: James Gosling
James Gosling designed Java at Sun Microsystems, where it was released in 1995 with the promise of compiling to bytecode that any Java Virtual Machine could run. Dennis Ritchie created C, John Backus led the FORTRAN team, and Grace Hopper drove the development of COBOL.
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