Computer Knowledge MCQ-250

The idea of automation with a stack as auxiliary storage—

(A) Finite automata
(B) Pushdown automata
(C) Deterministic automata
(D) All the above
(E) None of these

Which of the following derivations does a top-down parser while parsing an input string?
The input is assumed to be scanned in left to right order.

(A) Left most derivation
(B) Left most derivation traced out in reverse
(C) Right most derivation
(D) Right most derivation traced out in reverse
(E) None of these

Layer one of the OSI model is:

(A) Physical layer
(B) Link layer
(C) Transport layer
(D) Network layer
(E) None of these

IE uses……………………

(A) Active X controls for interaction between browser and third party application and the operating system
(B) Active X control for browser and operating system
(C) Both 1 and 2
(D) Active X controls for only operating system
(E) None of these

Parsing is also known as ————

(A) Lexical analysis
(B) Syntax analysis
(C) Semantic analysis
(D) Code generation
(E) None of these

The derivation will be called…….derivation if the non-terminal symbol replaced at every step is
the left most non-terminal symbol in the string.

(A) Left shifting
(B) Left recursion
(C) Left most
(D) Left pushdown
(E) None of these

Who provide the leased line?

(E) None of these

Master slave flip-flop is also referred to as the………….

(A) Level triggered flip-flop
(B) Pulse triggered flip-flop
(C) Edge triggered flip-flop
(D) All the above
(E) None of these

Which of the following circuit type is based up on time or clock pulse?

(A) Combinational circuit
(B) Sequential circuit
(C) Full adder
(D) All the above
(E) None of these

A solution to the problem were the source and destination hosts are on the same type of network, but there is a
different network in between——

(A) Data link
(B) Packet
(C) Tunneling
(D) Hopping
(E) None of these

Which is true?

(A) Functional testing is called black box testing
(B) Structure testing is called glass box testing
(C) Glass box testing is called white box testing
(D) All the above
(E) None of these

Storage class defines

(A) The data type
(B) The scope
(C) The scope and performance
(D) The scope, performance and data type
(E) None of these is a class_____ address

(A) A
(B) B
(C) C
(D) D
(E) None of these

DMA is

(A) High speed I/O devices
(B) It transfers blocks of data directly to and from its own buffer storage to memory
(C) In DMA transfer for I/O. CPU has no intervention
(D) All the above
(E) None of these

Randomized quick sort is an extension of quick sort where the pivot is chosen randomly. What is the worst case complexity of sorting n numbers using randomized quick sort?

(A) 0(n)
(B) O(n log n)
(C) 0(n2)
(D) O(log n)
(E) None of these

CIDR (Classless inter Domain Routing) For More Info visit:

(A) It is used in class C Networks
(B) It is used in class B Networks
(C) It is used in class A Network
(D) All the above
(E) None of these

What type of attack do some firewalls try to limit by enforcing rules on how long a GET or POST request can be?

(A) Smurf
(B) Denial of service
(C) Buffer overflow
(E) None of these