To read two characters from a file object infile, we use ____________

To read two characters from a file object infile, we use . . . . . . . .

A

infile.read(2)

B

infile.read()

C

infile.readline()

D

infile.readlines()

To read the entire remaining contents of the file as a string from a file object infile, we use ____________

A

infile.read(2)

B

infile.read()

C

infile.readline()

D

infile.readlines()

To read the next line of the file from a file object infile, we use ____________

A

infile.read(2)

B

infile.read()

C

infile.readline()

D

infile.readlines()

To read the remaining lines of the file from a file object infile, we use ____________

A

infile.read(2)

B

infile.read()

C

infile.readline()

D

infile.readlines()

To read the entire remaining contents of the file as a string from a file object infile, we use . . . . . . . .

A

infile.read(2)

B

infile.read()

C

infile.readline()

D

infile.readlines()

To read the next line of the file from a file object infile, we use . . . . . . . .

A

infile.read(2)

B

infile.read()

C

infile.readline()

D

infile.readlines()

To read the remaining lines of the file from a file object infile, we use . . . . . . . .

A

infile.read(2)

B

infile.read()

C

infile.readline()

D

infile.readlines()

Consider the following partial Schedule S involving two transactions T1 and T2. Only the read and the write operations have been shown. The read operation on data item P is denoted by read(P) and the write operation on data item P is denoted by write(P) Time Instance Transaction-id T1 T2 1 read(A) 2 write(A) 3 read(C) 4 write(C) 5 read(B) 6 write(B) 7 read(A) 8 Commit 9 read(B) Schedule S Suppose that the transaction T1 fails immediately after time instance 9. Which one of the following statements is correct?

A

T2 must be aborted and then both T1 and T2 must be re-started to ensure transaction atomicity

B

Schedule S is non-recoverable and cannot ensure transaction atomicity

C

Only T2 must be aborted and then re-started to ensure transaction atomicity

D

Schedule S is recoverable and can ensure atomicity and nothing else needs to be done

A

i only

B

ii only

C

Both i and ii

D

Neither i nor ii

In a survey of 60 people, it was found that 25 read Newsweek magazine, 26 read Time, 26 read Fortune, 9 read both Newsweek and Fortune, 11 read both Newsweek and Time, 8 read both Time and Fortune and 3 read all magazines. Then number of people who read only Newsweek, Time and Fortune are respectively.

A

7, 1 and 2

B

4, 2 and 6

C

8, 10 and 12

D

2, 8 and 4

To read two characters from a file object infile, we use ____________

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