Find VB Level 2 review materials, VB Level 2 questions

If you have a book, just buy one yourself, and before each second-level exam, there are exam questions to refer to, 100% of which are inside, and there are many questions.

Answer to this question: a

xa and a=b is a logical expression, and the value of the logical expression can only be true or false, because x=2, y=5, so x

x+ guarantees that the third digit is rounded.

X+ guarantees that the decimal place is the third place.

int((x+, remove the decimal places.)

int((x+guaranteed two decimal places.)

VB Past Papers Collection.

Past Question 1. 1. Multiple choice questions.

Among the four options a), b), c) and d) of the following questions, only one option is correct, please write the correct option on the corresponding position on the answer sheet, and the answer will not be scored on the test paper.

1) In order to avoid the flexibility of flowcharts in describing program logic, block diagrams are proposed to replace traditional program flowcharts, which are also commonly referred to as "flowcharts".

a) Pad diagram.

b) n-s diagram.

c) Structural diagram.

d) Data flow diagrams.

2) Structured programming is mainly emphasized:

a) The size of the procedure.

b) Efficiency of the procedure.

c) The sophistication of programming languages.

d) Legibility of the program.

3) In order to make the module as independent as possible, requirements:

a) The degree of cohesion of the modules should be as high as possible, and the degree of coupling between the modules should be as strong as possible.

b) The degree of cohesion of the modules should be as high as possible, and the degree of coupling between the modules should be as weak as possible.

c) The degree of cohesion of the modules should be as low as possible, and the degree of coupling between the modules should be as weak as possible.

d) The degree of cohesion of the modules should be as low as possible, and the degree of coupling between the modules should be as strong as possible.

4) The task of the requirements analysis stage is to determine.

a) Software development methodology.

b) Software development tools.

c) Software development costs.

d) Software system functionality.

5) The infinity of the algorithm refers to:

a) The runtime of the algorithm program is limited.

b) The amount of data processed by an algorithmic program is limited.

c) The length of the algorithm program is limited.

d) The algorithm can only be used by a limited number of users.

6) Sort the linear table of length n, in the worst case, the number of comparisons is not n(n-1) 2.

a) Quick sort.

b) Bubbling sorting.

c) Direct Insert Sorting.

d) Heap sorting.

7) If the incoming sequence is e1, e2, e3, e4, then the possible e-stack sequence is.

a)e3,e1,e4,e2

b)e2,e4,e3,e1

c)e3,e4,e1,e2

d) Any order.

8) When converting an E-R diagram to a relational pattern, both entities and connections can be represented.

a) Attributes b) Relationships.

c) key d) domain.

9) There are three relationships r, s, and t as follows:

The relationship t is obtained by the operation of the relation r and s, then the operation used is .

a) and b) natural connection.

c) Cartesian product.

d) 10) The following description of the database is correct.

a) Data processing is the process of transforming information into data.

b) The physical independence of data means that when the logical structure of the data changes, the storage structure of the data does not change.

c) Each column in the relationship is called a tuple, and a tuple is a field.

d) If an attribute or attribute group in a relationship is not a keyword for that relationship, but it is a keyword for another relationship, it is said to be a keyword outside the relationship.

11) The extension of the form file is.

a) .bas

b) .cls

c) .frm

d) .res