1
GATE CSE 2012
MCQ (Single Correct Answer)
+1
-0.3
Given the language L= { ab, aa, baa }, which of the following strings are in L* ?

1) abaabaaabaa
2) aaaabaaaa
3) baaaaabaaaab
4) baaaaabaa

A
1,2 and 3
B
2,3 and 4
C
1,2 and 4
D
1,3 and 4
2
GATE CSE 2012
MCQ (Single Correct Answer)
+1
-0.3
The protocol data unit (PDU) for the application layer in the Internet stack is
A
Segment
B
Datagram
C
Message
D
Frame
3
GATE CSE 2012
MCQ (Single Correct Answer)
+1
-0.3
In the IPv4 addressing format, the number of networks allowed under Class C addresses is
A
214
B
27
C
221
D
224
4
GATE CSE 2012
MCQ (Single Correct Answer)
+2
-0.6
An Internet Service Provider (ISP) has the following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20.
The ISP wants to give half of this chunk of addresses to Organization A, and a quarter to Organization B, while retaining the remaining with itself. Which of the following is a valid allocation of address to A and B?
A
245.248.136.0/21 and 245.248.128.0/22
B
245.248.128.0/21 and 245.248.128.0/22
C
245.248.132.0/22 and 245.248.132.0/21
D
245.248.136.0/24 and 245.248.132.0/21
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