In 2020, the computer level II C language test will be practiced once a day (June 30th).

How are the friends who are preparing for the national computer level 2 C language exam reviewing? Global Qingteng Bian Xiao has released the daily exercises for the computer level 2 C language test in 2020 for your reference and review. Do it and test it yourself! For more information about the national computer secondary C language preparation, please pay attention to the global Ivy Computer secondary channel.

In 2020, the computer level II C language test will be practiced once a day (June 30th).

1. A binary tree * * * has 7 nodes, of which only 1 leaf nodes, so the depth of the binary tree is (assuming the root node is at 1 layer) ().

A.3

B.4

C6

D.7

Answer: d

2. Software can be divided into application software, system software and supporting software (or tool software) by function. The following belongs to the application software is ().

A. Student achievement management system

B.c language compiler

C.UNIX operating system

D. database management system

A: A.

3. The basic structure required by the structured program does not include ().

A. sequence structure

B. Jump to

C. Select (branch) structure

D. Repetitive (cyclic) structure

Answer: b

4. What is wrong in the following description is ().

The overall structure diagram of the system supports the detailed design of the software system.

Software design is the process of transforming software requirements into software expressions.

C data structure and database design is one of the tasks of software design.

D.PAD diagram is a representation tool for detailed software design.

A: A.

5. The database language responsible for query operation in the database is ().

A. Data definition language

B. Data management language

C. data manipulation language

D. data control language

Answer: c

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